Pygame - Pygame is a set of Python modules designed for writing games.

SFML - SFML provides a simple interface to the various components of your PC, to ease the development of games and multimedia applications. It is composed of five modules: system, window, graphics, audio and network.

Unigine - Unigine Engine is a proprietary cross-platform middleware, developed by Unigine Corp.

SDL - Simple DirectMedia Layer is a cross-platform multimedia library designed to provide low level...

Blender - Blender is the open source, cross platform suite of tools for 3D creation.

raylib - Cross-platform, open-source game development library in C.